Uses

.github/workflows/build_esp32.yml

@@ -11,6 +11,13 @@ jobs:
   build-esp32:
     runs-on: ubuntu-latest
       steps:
+        - name: Checkout code
+          uses: actions/checkout@v3
+          with:
+            submodules: "recursive"
+            ref: ${{github.event.pull_request.head.ref}}
+            repository: ${{github.event.pull_request.head.repo.full_name}}
+
         - name: Setup Python
           uses: actions/setup-python@v4
           with: